Chair glide



April 21,1925,

W. E. FlELDlNG CHAIR GLIDE File d D96 l1 1924 ATTORNEYJ Fatented 21,i925.

UNITED STATES PATENT OFFICEF WILLIAM E. FIELDING, 01] WATEBBURY,CONNECTICUT, ASSIGNOR TO THE MATTA- TUCK MANUFACTURING COMPANY, OFWATERBURY, CONNECTICUT, A CORPORA- TION OF CONNECTICUT.

oHArn GLIDE.

Application filed December 11, 1924. Serial No. 755,314.

To all whom it may concern:

Be it known that I, IVILLIAr. E. FIELDING,

a citizen of the United States, residing at- Waterbury, county of NewHaven, State of Connecticut, have'invented a certain new and" usefulImprovement in Chair Glides, of which the following is a full, clear,and exact description.

7 My invention relatesto chair glides and has for its object to producea dished circular sheet metal chair glide having reenforced prongslocated within the edge thereof and having the bases of said prongslocated in the plane corresponding approximately with the inner surfaceof the bottom of the glide and removed from the plane passing throughthe upper surface of the edge. In sheet metal chair glides heretoforemade and provided with upturned strength- 'ening rims, the prongs havein some cases been extensions from circular rims and located in thecylindrical extension thereof. This is objectionable in many instancessince it brings the prongs too near to the periphery of the end ofthechair leg to which they are to be attached. In other cases the glideshave been distorted so that a prong bearing rim, at and adjacent to itsprong bearing portions, is bent inward so as to bring the prongs nearerthe center. This distortion of the glide is objectionable, the circularform being preferable.

In my glide the circular form of the glide is maintained and the prongsare nevertheless located nearer the center than the edge, being cutbackso as to be within the edge. The prongs are, therefore, more remote fromthe periphery of the end of the. leg to which they are to be attached sothat they are less liable to split the leg. My glide, therefore,

Fig. 5 is asection of the device of Fig.

3 on the line. 55, Fig. 3'; v

Fig. 6 is a plan view of the finished product embodying my invention; v

' Fig. 7 is side elevation of the same; and

Fig. 8 is a section on the line 7+7, F ig. 6.

Referring to the drawings, Figs. 6, 7, and 8, 2 is the bottom surface ofthe dished chair glide. l are three prongs whose bases are locatedsubstantially in the plane of the bottom of the chair glide. 6 is theedge of the chair glide and 88 are portions integral with the edge whichare made to lie behind the prongs so as to laterally reenforce the same.

This chair glide is formed of sheet steel and after it is shaped insuitable dies is hardened so as to be glass hard by any suitableprocess. After hardening the glides are tumbled in a tumbling barrel soas to be polished on their lower surfaces.

In forming this glide I first form a blank of steel, as shown in Fig. 2,the same having arcuate sections 10 and three projections 12. Theseprojections are so shaped that they can be sheared or out along dottedlines 1a, shown in Fig. 2, leaving three tongues and adjacent to eachside of each tongue a projection for the purpose herein specified. Forclearness the width of the shearing cuts shown in dots in Figs. 2 andfull lines in Figs. 3 and 4 is exaggerated so as to show spaces. Thesespaces, however, are not necessary in actual practice, mere severingcuts as shown in Fig. 6 being sufficient.

In forming the chair glide I first submit the blank to the action ofdies which dish the same slightly as shown in Fig. 3 and shear theprojections 12 so as to divide each of them into three parts along thelines shown in dots at 14 in Fig. 2, forming prongs 4 and ears 20, 22separated by shear cuts 16, simultaneously bending the prongs upward andforcing them inward so that they are displaced and would lie within acylinder in alinement with the edge. This produces the interrupted edgedevice shown in Figs. 3, 4 and 5. After this device is produced Isubject the same to swaging dies which bend the ears 20 and 22laterally, forming eXtensions 88 behind the prongs 4, the inner faces ofthe extensions engaging the outer faces of the prongs as shown in Figs.6, 7 and 8 thus completing the shaping of the chair 'lide.

After the glides are thus shaped they are subjected to the usualhardening process so to render them glass hard and then polished in atumbling barrel.

In this way a dished glide is secured which is circular and providedwith an ample gliding or bearing surface and in which the prongs arelocated within an interrupted edge and laterally reenforced ashereinbefore set forth, their bases being substantially in the plane ofthe face or lower portion of the glide,

The glide with the prongs thus formed, because the prongs are broughtnearer to the center of the glide are less liable to split the leg ofthe cha1r to which they may be applied. The portions 8, 8 reenforce theprongs 4 so that they are as strong as though they were shorter andconstituted continuations of or projections from an upturned rim.

1 preferably form a chair glide with three prongs but as is evident myinvention permits of various modifications without departing from thespirit thereof or the scope of the appended claim.

\Vhat I claim is:

An integral dished chair glide made of sheet metal and having a circularform and provided with an interrupted edge and prongs located withinsaid edge having their bases in a plane below the plane of said edge,said interrupted edge having portions extending in front of the outerfaces of said prongs, the inner faces of said extensions engaging saidouter faces of said prongs and reenforcing said prongs.

In testimony whereof I have signed my name to this specification, this10th day of December 1924.

XVILLIAM E. FIELDING.

